From 42585abb29cd1c18ba4ddca7dca842c43bff8935 Mon Sep 17 00:00:00 2001
From: Yin Wang <yinwang0@gmail.com>
Date: Sun, 2 Feb 2014 02:40:24 -0800
Subject: [PATCH] apply Declare.evalProperties to functions with properties

---
 src/main/java/org/yinwang/yin/ast/Call.java   |  8 ++++++-
 .../java/org/yinwang/yin/ast/Declare.java     | 21 ++++++++++++-------
 2 files changed, 21 insertions(+), 8 deletions(-)

diff --git a/src/main/java/org/yinwang/yin/ast/Call.java b/src/main/java/org/yinwang/yin/ast/Call.java
index 8f941f1..8349ba0 100644
--- a/src/main/java/org/yinwang/yin/ast/Call.java
+++ b/src/main/java/org/yinwang/yin/ast/Call.java
@@ -23,15 +23,21 @@ public Call(Node func, Argument args, String file, int start, int end, int line,
     public Value interp(Scope s) {
         Value fun = this.func.interp(s);
         if (fun instanceof Closure) {
+            Fun def = ((Closure) fun).fun;
             Closure closure = (Closure) fun;
             Scope funScope = new Scope(closure.env);
             List<Name> params = closure.fun.params;
 
+            if (def.properties != null) {
+                Declare.evalProperties(def.properties, funScope);
+            }
+
             if (!args.positional.isEmpty() && args.keywords.isEmpty()) {
                 // positional
                 if (args.positional.size() != params.size()) {
                     _.abort(this.func,
-                            "calling function with wrong number of arguments: " + args.positional.size());
+                            "calling function with wrong number of arguments. expected: " + params.size()
+                                    + " actual: " + args.positional.size());
                 }
 
                 for (int i = 0; i < args.positional.size(); i++) {
diff --git a/src/main/java/org/yinwang/yin/ast/Declare.java b/src/main/java/org/yinwang/yin/ast/Declare.java
index 77e06bc..82687f0 100644
--- a/src/main/java/org/yinwang/yin/ast/Declare.java
+++ b/src/main/java/org/yinwang/yin/ast/Declare.java
@@ -3,11 +3,8 @@
 import org.yinwang.yin.Constants;
 import org.yinwang.yin.Scope;
 import org.yinwang.yin._;
-import org.yinwang.yin.parser.Parser;
 import org.yinwang.yin.value.Value;
 
-import java.util.LinkedHashMap;
-import java.util.List;
 import java.util.Map;
 
 
@@ -23,6 +20,16 @@ public Declare(Scope propsNode, String file, int start, int end, int line, int c
 
 
     public Value interp(Scope s) {
+        evalProperties(propsNode, s);
+        return Value.VOID;
+    }
+
+
+    // helper
+    // evaluate the properties inside propsNode
+    // then merge into the Scope s
+    public static void evalProperties(Scope propsNode, Scope s) {
+        // evaluate the properties
         Scope properties = new Scope();
         for (String field : propsNode.keySet()) {
             Map<String, Object> props = propsNode.lookupAllProps(field);
@@ -32,13 +39,15 @@ public Value interp(Scope s) {
                     Value vValue = ((Node) v).interp(s);
                     properties.put(field, e.getKey(), vValue);
                 } else {
-                    _.abort(this, "property is not a node, parser bug: " + v);
+                    _.abort("property is not a node, parser bug: " + v);
                 }
             }
         }
 
+        // merge the properties into current scope
         s.putAll(properties);
 
+        // set default values for variables
         for (String key : properties.keySet()) {
             Object defaultValue = properties.lookupPropertyLocal(key, "default");
             if (defaultValue == null) {
@@ -49,11 +58,9 @@ public Value interp(Scope s) {
                     s.putValue(key, (Value) defaultValue);
                 }
             } else {
-                _.abort("default value is not value, shouldn't happen");
+                _.abort("default value is not a value, shouldn't happen");
             }
         }
-
-        return Value.VOID;
     }